Automatic control device for an electrical heating appliance

Abstract

The invention relates to an automatic control device for an electrical heating appliance including a rectifier-inverter, in which one input is connected to the power grid and one output is connected to a circuit including an insulated gate bipolar transistor (IGBT) connected in series with at least one resistor of an electrical heater. There is also an electronic controller, being capable of receiving data from a temperature selector that can be actuated by the user, the selector enabling the user to select the ambient temperature to be reached in the room where the electrical heating appliance is installed. There is also at least one temperature sensor, namely an ambient temperature sensor. The electronic controller controls the insulated gate bipolar transistor by adjusting the intensity of the electric current that flows through at least one resistor of the electrical heating appliance.

1 . Automatic control device for an electrical heating appliance, said control device comprising:
 a rectifier-inverter, having one inlet connected to a power network and an outlet connected to a circuit, said circuit comprising an insulated-gate bipolar transistor (IGBT) connected in series to at least one resistor of an electrical heating appliance;   electronic control means receiving data from a temperature selector that can be actuated by the user, said temperature selector selecting ambient temperature to be reached in a room in which the electrical heating appliance is installed; and   at least one temperature sensor, namely an ambient temperature sensor, wherein said electronic control means acts on said insulated-gate bipolar transistor by controlling intensity of the electric current flowing through at least one resistor of the electrical heating appliance.   
     
     
         2 . Device according to  claim 1 , further comprising:
 an additional temperature sensor measuring temperature reached by the device.   
     
     
         3 . Device according to  claim 1 , further comprising:
 at least one resistor the control of the current intensity of which occurs by pulse width modulation (PWM).   
     
     
         4 . Device according to  claim 1 , wherein the inlet of the rectifier is provided with a filter means avoiding interferences produced by radiofrequency.